Which is the best example of the concept of heredity? a. a black cat blends into its environment at night. b. a baby has his mother's hair and eye color. c. as a barnacle grows, it gets calcium for its shell from seawater. d. the sunflower will move so its flower head is always facing the sun.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit